[Aura] Initial app list webui.

chrome/browser/resources/ntp4/page_switcher.js

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview Page switcher
  * This is the class for the left and right navigation arrows that switch
  * between pages.
  */
 cr.define('ntp4', function() {
 
   function PageSwitcher() {
   }
 
   PageSwitcher.template = {
     __proto__: HTMLButtonElement.prototype,
 
     decorate: function(el) {
       el.__proto__ = PageSwitcher.template;
 
       el.addEventListener('click', el.activate_);
       el.addEventListener('mousewheel', el.onMouseWheel_);
 
       el.direction_ = el.id == 'page-switcher-start' ? -1 : 1;
 
-      el.dragWrapper_ = new DragWrapper(el, el);
+      el.dragWrapper_ = new cr.ui.DragWrapper(el, el);
     },
 
     /**
      * Activate the switcher (go to the next card).
      * @private
      */
     activate_: function() {
       var cardSlider = ntp4.getCardSlider();
       cardSlider.selectCard(cardSlider.currentCard + this.direction_, true);
     },
@@ skipping 72 matching lines @@
         this.dragNavTimeout_ = null;
       }
     },
 
   };
 
   return {
     initializePageSwitcher: PageSwitcher.template.decorate
   }
 });